Poirot smiled.
"Mon ami, have you ever, when writing a letter, been arrested by the fact that you did not know how to spell a certain word?"
"Yes, often. I suppose every one has."
"Exactly. And have you not, in such a case, tried the word once or twice on the edge of the blotting-paper, or a spare scrap of paper, to see if it looked right? Well, that is what Mrs. Inglethorp did. You will notice that the word 'possessed' is spelt first with one 's' and subsequently with two—correctly. To make sure, she had further tried it in a sentence, thus: 'I am possessed.' Now, what did that tell me? It told me that Mrs. Inglethorp had been writing the word 'possessed' that afternoon, and, having the fragment of paper found in the grate fresh in my mind, the possibility of a will—(a document almost
